Toba Lake was formed by a stupendous prehistoric volcanic explosion. The eruption was 75.000 years ago and leaving a spectacular caldera with wonderful landscapes. Toba Lake is the largest volcanic lake in Southeast Asia and the highest lake in the world, with gigantic size of 1.265 sq km and a depth of over 450m. Lying at 906 above sea level, the climate in the Toba area is refreshingly cool. The volcanic soils are remarkably fertile and the Toba highlands have been inhabited for centuries.